#include "stm32f10x.h"                  // Device header
#include "stdint.h"

uint16_t CountSensor_Count;

void CountSensor_Init(void)
{
	
	GPIO_InitTypeDef GPIO_InitStructure;
	EXTI_InitTypeDef EXTI_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;          //这三个定义必须放在函数开投，不然会报错
	
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
	GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_InitStructure);
	
	GPIO_EXTILineConfig( GPIO_PortSourceGPIOB,GPIO_PinSource14);
	
	
	
	EXTI_InitStructure.EXTI_Line  = EXTI_Line14  ;
	EXTI_InitStructure.EXTI_LineCmd=ENABLE;
	EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
	EXTI_InitStructure.EXTI_Trigger =EXTI_Trigger_Falling;
	EXTI_Init(&EXTI_InitStructure);
	
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	
	
	NVIC_InitStructure.NVIC_IRQChannel =EXTI15_10_IRQn ;
	NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
	
	NVIC_Init(&NVIC_InitStructure);
	
  
}

uint16_t  CountSensor_Get(void)
{
  return CountSensor_Count;
}


void EXTI15_10_IRQHandler(void)
{

   if(EXTI_GetITStatus(EXTI_Line14)==SET)
	 {
	 if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14)==1)
	 { 
		 CountSensor_Count++;
		 EXTI_ClearITPendingBit(EXTI_Line14);
	 } 
		 
	 }


}


